大约有 43,100 项符合查询结果（耗时：0.0752秒） [XML]
How to calculate age (in years) based on Date of Birth and getDate()
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Python: fastest way to create a list of n lists
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The probably only way which is marginally faster than
d = [[] for x in xrange(n)]
is
from...
How to remove duplicate white spaces in string using Java?
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edited Oct 29 '16 at 4:20
answered Oct 18 '10 at 12:13
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Simple Pivot Table to Count Unique Values
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16 Answers
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How to remove last n characters from every element in the R vector
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Here is an example of what I would do. I hope it's what you're looking for.
char_array = c("...
How to select lines between two marker patterns which may occur multiple times with awk/sed
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Use awk with a flag to trigger the print when necessary:
$ awk '/abc/{flag=1;next}/mno/{flag=...
How to change plot background color?
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You created a figure and axis/es together
fig, ax = plt.subplots(nrows=1, ncols=1)
You created a figure, then axis/es later
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1) # nrows, ncols, index
You used the stateful API (if you're doing anything more than a few lines, and especially if you h...
Extract a number from a string (JavaScript)
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21 Answers
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class method generates “TypeError: … got multiple values for keyword argument …”
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The problem is that the first argument passed to class methods in python is always a copy of t...
How to output only captured groups with sed?
...e output as well as specifying what you do want.
string='This is a sample 123 text and some 987 numbers'
echo "$string" | sed -rn 's/[^[:digit:]]*([[:digit:]]+)[^[:digit:]]+([[:digit:]]+)[^[:digit:]]*/\1 \2/p'
This says:
don't default to printing each line (-n)
exclude zero or more non-digits
i...